Mechanism for crimping retaining rings on containers



March 9, 1954 JANSEN 2,671,490

MECHANISM FOR CRIMPING RETAINING RINGS ON CONTAINERS Filed March 22,1949 6 Sheets-Sheet 1 e'orgel) Jknsen (BY fizz,

March 9, 1954 JANSEN 2,671,490

MECHANISM FOR CRIMPING RETAINING RINGS 0N CONTAINERS Filed March 22.1949 e SheetsSheet 2 12% for: emyefi Jnsen G. D. JANSEN 2,671,490

MECHANISM FOR CRIMPING RETAINING RINGS ON CONTAINERS March 9, 1954 6Sheets-Sheet 5 Filed March 22, 1949 I n-zo'rr emye finsen By 14 figayMarch 9, 1954 JANSEN 2,671,490

MECHANISM FOR CRIMPING RETAINING RINGS ON CONTAINERS Filed March 22.1949 6 Sheets-Sheet 4 fieorye D Jansen March 9, 1954 G. D. JANSEN2,671,4

MECHANISM FOR CRIMPING RETAINING RINGS ON CONTAINERS 6 Sheds-Sheet 5Filed March 22. 1949 II (III a!!! NEEE: I 4

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MECHANISM FOR CRIMPING RETAINING RINGS 0N CONTAINERS Filed March 22.1949 I 6 Sheets-Sheet 6 54 14 .1 MIN- {/1 \1 i II I 311' .94

n 76 69 73 82 14 u: 0 m 92 6 83 q 1 I l Patented Mar. 9, 1954 MECHANISMFOR CRIMPINGRETAINING RINGS N CONTAINERS George D. Jansen, Chicago, mitContainer Company,

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11L, assi'gii'or to Suma corporation of Illi- Application March 22,1949; Serial No. 82,745

13 Claims. 1

This invention relates to machines for assembling containers, and moreparticularly concerned with the provision of a maehine adapted for usein the assembly or fiberboard containers of the type disclosed in mycopending patent application, Serial No. 68,609 filed December 31, 1948,now Pat. No. 2,547,395, granted April 3, 1951, in which the container isshown and described as comprising a flanged fiberboard bottom secured inone end of a tubular fiberboard side wall by means of a metallicretaining ring, the other end of the side wall being reinforced by ametallic reinforcing ring. Fiberboard containers of various types andsizes are now being used extensively by manufacturers of ice cream andother food products, in place of metal containers which required storagespace and washing equipment during their use. Fiberboard containers areadapted for a single use in storing or shipping ice cream or other foodproducts, and are usually sold to the ice cream manufacturers inknock-down collapsed condition in order to conserve space during storageor shipment. It is thus necessary for the ice cream manufacturer toemploy the use of a machine for assembly of thec'entainers and it is theusual practice to assemble the containers as same are required for use.As manuproducts facturers of ice cream and other fend usually employ theservices of girls in the assembly of knock-down fiberboard containers,it is an object of the present invention to provide a machine which issimple in operation and requires minimum eiiort and time on the part ofthe operator in the assembly of the containers. This invention furthereontemp atesth pro: vision of a machine provided with two sets 6fcrimping rolls adapted to act simultaneously in crimping the retainingand reinforcing rings upon opposite ends of the side wall of acontainer, the crimping rolls being mounted ior simultaneous movementinto and out of engage them with their respectiverings responsive tooperation of a single control lever. V x

This" invention further contem lat'es the pro: vision of a machineinwhich the two sets 6i crimping rolls are adapted to be moved toward oraway from each other to accommodate contimers of various sizes, one Setof ions being mounted for vertical reciprocable movement along a column,While the other" Set of ions mounted. Within a head pivatauy nioiintedupon the upper end or the column. 7 I i This invention furthercontemplates the pievision of a container assembly machine in which 2the crimping rolls act to provide a line contact engagement between theretaining and reinforcing rings and the fiberboard employed to form theside wall and bottom of thecontainer. In other types of knock-downcontainers, it has been the practice to crimp one edge of the retaining"or reinforcing ring into engagement with the fiberboard, whichconstruction causes the sharp edge of the ring to cut into thefiberboard and thus produce a weakened s ection. By providing a linecontact engagement between the metal rings and the fiberboard, thefiber; board is not weakened and the rings serve to grip the fiberboardmore tightly than other types of rings heretofore employed in assemblingcontainers. I v I This invention further contemplates the pro: vision ofa container assembly machine pro vided with two sets of crimping rollswhich are urged into crimping engagement under a pro determined load andwithout depending upon the skill of the operator. This is accomplishedby providing a pivotal mounting for each tr meing roll whereby the rollsin eaeh set may be moved toward or away from each cthehwitn each set ofrolls normally urged into crimp engagement by means of, a plurality oftension springs responsive to the control of a cam member. H H p w Thisinvention further contemplates the provision of a container assemblymachine' in which each crimping roll is positively driven by of gearsleading to a -common drive shaft. It has been learned that such a driveforthe sev eral crimping rolls results less scuffirig' and marririg ofthe finished surface of the" metallic rings.

This invention further contemplates the pro vision of a container assebly machine embody ing' avariable diameter mandreljournaled forrotational movement in anincline'd plane" and serving to guide and holdthe several parts the container against accidental displacement duringthe ring crimping operation. During'the assembly of containers, it iscontemplated that each size container shall have a mandrel core}sponding to the size of the container In other words, a longer mandrelis employed 7 on a. gallon container than on a 2 gallon container. Thisinvention embodies other novel features, details of construction andarrangement ojf parts which are hereinafter set forth in the specification and claims and illustrated in the aecoinp'anyin'g drawings,wherein: Fig. 1 iS a Side elevation container assembly machine embodyingfeatures of the present invention.

Fig. 2 is an enlarged vertical sectional view illustrating thearrangement of parts of the container and the machine immediately priorto the ring crimping operation.

Fig. 3 is a top plan view showing the machine.

Fig. 4 is an enlarged fragmentary sectional view taken along the line4-4 of Fig. 2.

Fig. 5 i an enlarged fragmentary sectional View taken along the line 5-5of Fig. 2.

Fig. 6 is an enlarged sectional view taken along the line 6-6 of Fig. 2.

Fig. 7 is a detail sectional view taken along the line 1-1 of Fig. 5.

Fig. 8 is an enlarged sectional view taken along the line 8-8 of Fig. 2.

Fig. 9 is a sectional view taken along the line 9-9 of Fig. 8.

Fig. 10 is a detail sectional view taken along the line 10-! 0 of Fig.9.

Fig. 11 is an enlarged fragmentary sectional view illustrating themanner in which the rolls crimp the metallic retaining and reinforcingrings in forming the container.

Fig. 12 is a fragmentary side elevational view illustrating themechanism employed for simultaneously opening and closing, the crimpingrolls.

Fig. 13 is a fragmentary side elevational view corresponding to Fig. 12,showing the head of the machine pivoted to its open position.

Fig. 14 is a detail sectional view taken along the line l4-I4 of Fig.12.

Referring now to the drawings for a better understanding of thisinvention, the container assembly machine is shown as comprising atubular column 6 which is preferably supported in an inclined plane upona base 1. A roll supporting carriage 8 is provided with a sleeve bearing9 to receive the column 6, and a set screw I l is threaded through thesleeve bearing 9 for engagement in an aperture l2 formed in the columnto secure the roll carriage 8 in fixed position. Other apertures 12a,etc. must be provided in the column 6 to adjust the carriage 8 along thecolumn B when the machine is employed for assembling containers ofdifferent lengths.

" The outer end of the carriage 8 is provided with an aperture toreceive a mandrel shaft 13 disposed in a plane parallel with the column5, the I shaft 13 being secured in fixed position by means of a setscrew [4. A mandrel I6 is journaled for rotational movement upon theshaft 13. The mandrel I6 is preferably constructed to permit a limitedamount of expansion and contraction for the reasons hereinafter setforth. The mandrel is shown as comprising a pair of semicircular plates11 and 11a formed with inturned flanges 'l8-l8 and Ill-I9, respectively,each of said flanges being formed with a pair of apertures to receivealignment studs 2|. The alignment studs 2| are secured intermediatetheir ends within apertures extending transversely through the ends ofarms 22-22 of a spider 23 and arms 24-24 of a spider 26. The spiders 23and 26 are also provided with a pair of radially disposed arms 21-21 and28-28, respectively, the ends of the arms 21-21 and 28-28 being bored toreceive studs 29 secured to the mandrel plates 11 and 11a. A compressionspring 3| is mounted upon each of the arms 21-21 and 28-28 to yieldablyresist inward movement of the mandrel plates 11 and [1a, the outwardmovement of the plates I 1 and [1a being determined by stop washers 32provided on the ends of each alignment 4 stud 21. The spiders 23 and 26are provided with bearings 33 and 34 to receive the shaft I 3. Anabutment plate 36 is journaled on the upper end of the shaft l3 forsurface alignment with the upper end of the plates l1 and Ila of themandrel.

A pair of lower crimping rolls 31 and 31a are formed with shaft portionsjournaled for rotational movement in bearings 38 and 38a, respectively.The lower ends of the bearings 38 and 3811 are each provided with a pairof pivot pins 39-39 and 4I-4l, respectively, for engagement in bearingapertures formed in the carriage 8. Gears 42 and 43 are keyed to theshaft portions of the rolls 31 and 31a, respectively, for meshingengagement to drive the rolls 31 and 31a in opposite directions.

A driving gear 44 is keyed to a drive shaft 46 for meshing engagementwith the gear 42, the gear 44 havin a hub portion journaled in a bearing41 provided on the carriage 8. The gear 44 is held against upwarddisplacement by means of a thrust plate 48 provided on the carriage 8. Apair of tension springs 49-49 are connected at their ends to pivotbearings 38 and 38a to normally urge the rolls 31 and 31a toward eachother. A cam shaft 5| is journaled at its ends in suitable bearingsprovided in the carriage 8 and is formed or provided with a cam 52 whichacts to control the pivotal movement of the bearings 38 and 38a.

A head 53 is mounted for pivotal movement about the axis of a pivot pin54 extending through the upper end of the column 6. A pair of uppercrimping rolls 55 and 55a are formed with shaft portions journaled forrotational movement in bearings 56 and 56a, respectively. The bearings56 and 560. are provided with pivot pins 51 and 53, respectively, forrotational movement in suitable bearings provided in the head 53. Gears59 and 6! are keyed to the shaft portions of the rolls 55 and 55a,respectively, for intermeshing engagement to drive the rolls in oppositedirections. A driving gear 62 is keyed to the drive shaft 46 and isprovided with a hub portion journaled in T a suitable bearing formed ina bearing bracket 63 welded to the column 6. The gear 62 is held againstdownward displacement from its bearing by means of a thrust bearingplate 64 welded to the column 6. An electric motor 86 is secured to thebase 1 and is provided with a reduction gear unit 61 to transmit powerto the drive shaft 46.

A pair of tension springs 68-68 are secured at their ends to thebearings 56 and 56a to normally urge the rolls 55 and 55a toward eachother. A cam shaft 69 is journaled at its ends in suitable bearingsprovided in the head 53 and is formed or provided with a cam 1|interposed between the bearings 56 and 56a to control the spacingbetween the bearings.

The crimping roll control mechanism is shown as comprising ahand-operated control lever 12 mounted for pivotal movement at 13 on thehead 53. A connecting link 14 is pivotally connected at its one end tothe control lever 12 and at its other end to the free end of a lever 16keyed to the cam shaft 69. An arm 11 is pivotally connected at its oneend to the free end of the lever 16 and is supported at its other endwithin an aperture provided in a bearing bracket 18, the free end of thearm 11 being bent downwardly at 19 for operative engagement within aslot8| provided in a U-shaped lever 82. The lever 82 is keyed to a shaft 83journaled at its upper end in the thrust bearing plate 64 and at itslower end the carriage 8.

in a suitable bearing provided in gee-1,496

The lower end of the shaft 83 is splined to 'receive and engage a lever84 having its free end pivotally connected to one end of a link 86 whichis connected at its other end to a lever B! keyed to the cam shaft 5I.posed in its operating position as illustrated in Figs. 1, 2 and 12 inthe drawings, the forward end of the head is adapted to rest upon theupper end of an abutment bar secured to the base I. A

latch 89 is mounted for pivotal movement on a pivot pin 9I provided onthe forward end of the head 53, the free end of the latch being providedwith a hook portion 92 for engagement under a shoulder 93 formed on theabutment bar 88. As illustrated in Fig. 12, a compression spring 94 isprovided on the head 53 to normally urge the latch 89 into engagementwith the abutment shoulder 93 formed on the abutment bar 88. An arm 96is secured to the operating handle I2 to engage and release the latch 89when the control arm I2 is moved to its forward position, as illustratedin doted outline in Fig. 12.

As heretofore pointed out, the machine shown and described is adaptedfor use in assembling contaniers of the type disclosed in my copendingapplication, Serial No. 68,609, the container comprising a tubularfiberboard side Wall I I, a fiberboard bottom I02 formed with an annularflange I03, a metallic retaining ring 394, and a metallic reinforcingring I06. In assembling the container, the head 53 is disposed in itsupper position, as illustrated in dotted outline in Fig. 1. A V- shapedreinforcing ring I06 is first moved downwardly over the upperpnd of themandrel to its position illustrated in dotted outline in Fig. 11, oneleg of the ring being engaged in an annular recess I08 formed in thesemi-circular plates I1 and He. The fiberboard side wall is thendirected over the mandrel I6 to engage the reinforcing ring I06 and tomove the latter downwardly over the mandrel until the ring is disposedin an annular groove I09 formed in the carriage 6. When the reinforcingring I06 is located in the groove I99, the compression springs 3I act tospread the plates I! and lid of the mandrel until they are in snugengagement against the inner surface of the side wall I0 I. Thefiberboard bottom I02 is then pressed into the side wall IOI until itseats against the abutment plate 36 of the mandrel I6. The retainingring I04 is then mounted over the flange portion I03 of the fiberboardbottom I02 and over the adjacent portion of the side wall I0 I.

After the several parts of the container have been positioned upon themandrel I6 in the manner thusdescribed, the operator then moves the head53 downwardly into engagement with the abutment bar 88, the handle I2being disposed in the position illustrated in Fig. 2. During downwardmovement of the head, the teeth on the gear 59 are moved into meshingengagement with the teeth on the gear 62. To perform the crimpingoperation, the operator then pushes the handie I2 rearwardly from itsposition illustrated in dotted outline in Fig. 12 of the drawings to itsposition illustrated in full outline. Rearward' piv otal movement of thecontrol lever I2 causes the connecting link I4 to act through the leverI6 to rotate the cam shaft 69 and cam II. Rearward movement of thecontrol lever I2 also causes rearward movement of the arm II, pivotalmovement of thelever 82- and shaft 83 which act through the lever 94,connecting link 86, lever 81 and cam shaft'l to rotate the cam 52.

During rotational movement of th earns 52 When the head 53 is disand IIdue to rearward movement of the control lever I2, the tension springs49-49 and 68-68 act to pivot their respective bearings 88 and 38a and 56and 56a toward each other to bring the rolls 31 and 31a into crimpingengagement against opposite sides of the reinforcing ring I06, and therolls 55 and 55a into crimping engagement against opposite sides of theretaining ring I04. During movement of the crimping rolls intoengagement with their respective metallic rings, the rolls are rotatedby means of the electric motor 66 acting through reduction gear unit 61,drive shaft 46, driving gears 44 and 62 which, in turn, impartrotational movement to the gears 42 and 43 and gears 59 and BI,respectively. During the crimping operation, the crimping rolls causethe container parts and mandrel I6 to rotate about the shaft I3 untilthe legs of the metallic rings I04 and I06 are moved together into tightengagement with the fiberboard to complete the assembly of thecontainer, as illustrated in Fig. 11.

To prevent scraping or scufling of the metallic rings I04 and I06 duringthe crimping operation, it has been found desirable to provide aplurality of small roller bearings III within the carriage 8 and thehead 53 to engage the metallic rings during the crimping operation, theroller bearings III being arranged within the slot I09 of the carriage 8and within the slot H2 of the head 53. During rotational movement of themetallic rings I04 and I96, it will be noted that these rings bearagainst the roller bearings iII which then rotate about their hearingpoints II3. During the ring rolling operation, the head 53 is secured inits downward position against the abutment bar 88 by means of the latch89.

In removing the finished container from the machine, the control handleI2 is moved from its rearward position to its forward position, asillustrated in Fig. 12. The forward movement of the control lever I2first causes the cams 52 and II to pivot their respective bearings 3838aand 56-5611 away from each other to move the rolls 3I3Ia and 55-55a outof contact with the metallic rings I06 and I04, respectively. As thecrimping rolls are moved out of crimping engagement, the arm 96 acts torelease the latch 89 from its engagement with the abutment bar 88 topermit the head 53 to be pivoted upwardly about its pivot bearing 54-.To facilitate pivotal movements of the head 53, counterweights I I4-I-I4 are provided to extend rearwardly from the pivot 54 of the head.After the head 53' is moved to its raised. position, the operatorengages and' draws the finished container from the mandrel I6.

It will be noted that the machine thus shown and described is adaptedfor use in. the assembly of containers of different lengths. Asillustrated in Fig. 2, the carriage 8 may be raised or lowered toaccommodate containers of various sizes; In the. assembly of containersof. the type shown and described, it will be noted that the several.parts of the container are maintained in assembled relation during thering rolling operation by means of the. mandrel and the oppositelyfacing grooves formed in. the head 53 and carriage 8.

While this invention has been shown in but one form, it is obvious tothose skilled in the art that it is not so limited but is susceptible ofvarious changes in modifications without departing from the spirit andscope of the claimed invention.

I claim as my invention:

1. In a machine for assembling containers, a frame, a head pivotallymounted on said frame, a carriage adjustably mounted on said frame formovement relative to said head, a mandrel shaft provided on saidcarriage, a cylindrical mandrel journaled on said shaft, a pair ofcrimping rolls provided adjacent each other on said head, a pair ofcrimping rolls provided adjacent each other on said carriage, commonmeans to simultaneously move said pairs of crimping rolls into and outof crimping engagement adjacent the peripheral margins at opposite endsof the mandrel, common means to rotate said pairs of crimping rolls, anabutment bar provided on said frame for engagement with said head whenthe latter is disposed in its operative position, and latch meansprovided on said head for engagement with said abutment bar when saidpairs of crimping rolls are disposed in crimping engagement.

2. In a machine for assembling containers, a base, a column extendingupwardly from said base, a head pivotally mounted on the upper end ofsaid column, a carriage adjustably mounted on said column for movementrelative to said head, a mandrel shaft provided on said carriage andprojecting toward said head, a mandrel journaled on said shaft, a pairof retaining ring crimping rolls adjacent each other provided on saidhead adjacent the peripheral margin at one end of the mandrel, a pair ofreinforcing ring crimping rolls adjacent each other provided on saidcarriage adjacent the peripheral margin at the other end of the mandrel,cam means to move said pairs of crimping rolls out of crimpingengagement, resilient means to normally urge said pairs of crimpingrolls into crimping engagement, common means to simultaneously actuatesaid cams, common means to rotate said pairs of crimping rolls, saidmandrel comprising a pair of semi-cylindrical members mounted formovement toward or away from each other, and resilient means to normallyurge said plates away from each other.

3. In a machine for embracing a marginal edge portion of a tubular sidewall between connected flanges of a ring-shape member of generallyV-section, a frame, a rotatable mandrel journaled on said frame, a headsupported for \pivotal movement on said frame about an axis normal to aline parallel to the rotational axis of the mandrel, a pair of rollbrackets mounted for pivotal movement on said head on parallel axesnormal to lines parallel to said mandrel axis and at one side of thelatter, means to pivot said brackets toward and away from each other,rolls journaled in said brackets operative to roll connected ringflanges toward each other to embrace the marginal edge portion of a sidewall responsive to pivotal movement of said brackets, and common meansto drive said rolls.

4. In a machine for embracing a marginal edge portion of a tubular sidewall between connected flanges of a ring-shape member of generally V-section, a frame, a rotatable mandrel journaled on said frame, a headsupported for pivotal movement on said frame about an axis normal to aline parallel to the rotational axis of the mandrel, a pair of rollbrackets mounted for pivotal movement on said head on parallel axesnormal to lines parallel to said mandrel axis and at one side of thelatter, means to pivot said brackets toward and away from each other,rolls journaled in said brackets operative to roll connected ringflanges toward each other to embrace the marginal edge portions of aside wall responsive to pivotal movement of said brackets, and commonmeans to drive said rolls including meshing gears secured to said rolls.

5. In a machine for embracing a marginal edge portion of a tubular sidewall between connected flanges of a ring-shape member of generallyV-section, a frame, a rotatable mandrel journaled on said frame, a headsupported for pivotal movement on said frame about an axis normal to aline parallel to the rotational axis of the mandrel, a pair of rollbrackets mounted for pivotal movement on said head on parallel axesnormal to lines parallel to said mandrel axis and at one side of thelatter, means to pivot said brackets toward and away from each other,rolls journaled in said brackets operative to roll connected ringflanges toward each other to embrace the marginal edge portion of a sidewall responsive to pivotal movement of said brackets, said means topivot the roll brackets being disposed between the plane of the pivotalaxes of the brackets and said rolls.

6. In a machine for embracing a marginal edge portion of a tubular sidewall between connected flanges of a ring-shape member of generallyV-section, a frame, a rotatable mandrel journaled on said frame, a headsupported for pivotal movement on said frame about an axis normal to aline parallel to the rotational axis of the mandrel, a pair of rollbrackets mounted for pivotal movement on said head on parallel axesnormal to lines parallel to said mandrel and at one side of the latter,means to pivot said brackets toward and away from each other, rollsjournaled in said brackets operative to roll connected ring flangestoward each other to embrace the marginal edge portion of a side wallresponsive to pivotal movement of said brackets, said means to pivot theroll brackets being disposed between the plane of the pivotal axes ofthe brackets and said rolls and including a cam journaled for rotationon said head between said brackets to pivot the latter away from eachother.

7. In a machine for embracing a marginal edge portion of a tubular sidewall between connected flanges of a ring-shape member of generallyV-section, a frame, a rotatable mandrel journaled on said frame, a headsupported for pivotal movement on said frame about an axis normal to aline parallel to the rotational axis of the mandrel, two pairs of rollbrackets mounted for pivotal movement, one pair of said roll bracketsbeing mounted on said head, each pair of brackets having parallelpivotal axes normal to lines parallel to said mandrel axis and atoneside of the latter, means to pivot said brackets toward and away fromeach other, rolls journaled in said brackets, each pair of rolls beingoperative to roll connected ring flanges toward each other to embracethe marginal edge portion of a side wall responsive to pivotal movementof said brackets.

8. In a machine for embracing a marginal edge portion of a tubular sidewall between connected flanges of a ring-shape member of generallyv-section, a frame, a rotatable mandrel journaled on said frame, a headsupported for pivotal movement on said frame about an axis normal to aline parallel to the rotational axis of the mandrel, two pairs of rollbrackets mounted for pivotal movement, one pair of said roll bracketsbeing mounted on said head, each pair of brackets having parallelpivotal axes normal to lines parallel to said mandrel axis and at oneside of the latter, means to pivot said brackets toward and away fromeach other, rolls journaled in said brackets, each pair of rolls beingoperative to roll connected ring flanges toward each other to embracethe marginal edge portion of a side wall responsive to pivotal movementof said brackets, one roll of each pair being disposed between the axisof rotation and the projected periphery of the mandrel, and the otherroll being outside the projected periphery of the mandrel.

9. In a machine for embracing a marginal edge portion of a tubular sidewall between connected flanges of a ring-shape member of generallyV-section, a frame, a rotatable mandrel journaled on said frame, a headsupported for pivotal movement on said frame about an axis normal to aline parallel to the rotational axis of the mandrel, two pairs of rollbrackets mounted for pivotal movement, one pair of said roll bracketsbeing mounted on said head, each pair of brackets having parallelpivotal axes normal to lines parallel to said mandrel axis and at oneside of the latter, means to pivot said brackets toward and away fromeach other, rolls journaled in said brackets, each pair of rolls beingoperative to roll connected ring flanges toward each other to embracethe marginal edge portion of a side wall responsive to pivotal movementof said brackets, one roll of each pair being disposed between the axisof rotation and the projected periphery of the mandrel, and the otherroll being outside the projected periphery of the mandrel, and commonmeans to drive said rolls.

10. In a machine for embracing a marginal edge portion of a tubular sidewall between connected flanges of a ring-shape member of generallyV-section, a frame, a rotatable mandrel journaled on said frame, a headSupported for pivotal movement on said frame about an axis normal to aline parallel to the rotational axis of the mandrel, two pairs of rollbrackets mounted for pivotal movement, one pair of roll brackets mountedfor pivotal movement, one pair of said roll brackets being mounted onsaid head, each pair having parallel pivotal axes normal to linesparallel to said mandrel axis and at one side of the latter, means topivot each pair of said brackets toward and away from each other, rollsjournaled in said brackets, each pair of rolls being operative to rollconnected ring flanges toward each other to embrace the marginal edgeportion of a side wall responsive to pivotal movement of said brackets,said means to pivot each pair of said roll brackets being disposedbetween the plane of the pivotal axes of the pair of brackets and theirrespective rolls.

11. In a machine for embracing a marginal edge portion of a tubular sidewall between connected flanges of a ring-shape member of generallyV-section, a frame, a rotatable mandrel journaled on said frame, a headsupported for pivotal movement on said frame about an axis normal to aline parallel to the rotational axis of the mandrel, two pairs of rollbrackets mounted for pivotal movement, one pair of roll brackets beingmounted on said head, each pair having parallel pivotal axes normal tolines parallel to said mandrel axis and at one side of the latter, meansto pivot said brackets toward and away from each other, rolls journaledin said brackets, each pair of rolls being operative to roll connectedring flanges toward each other to embrace the marginal edge portion of aside wall responsive to pivotal movement of said brackets, said means topivot each pair of said roll brackets being disposed between the planeof the pivotal axes of the pair of brackets and their respective rollsand including cams journaled for rotation between related pairs ofbrackets to pivot the latter away from each other.

12. In a machine for embracing a marginal edge portion of a tubular sidewall between connected flanges of a ring-shape member of generallyV-section, a frame, a rotatable mandrel journaled on said frame, a headsupported for pivotal movement on said frame about an axis normal to aline parallel to the rotational axis of the mandrel, two pairs of rollbrackets mounted for pivotal movement, one pair of roll brackets beingmounted on said head, each pair having parallel pivotal axes normal tolines parallel to said mandrel axis and at one side of the latter, meansto pivot said brackets toward and away from each other, rolls journaledin said brackets, each pair of rolls being operative to roll connectedring flanges toward each other to embrace the marginal edge portion of aside wall responsive to pivotal movement of said brackets, said means topivot each pair of said roll brackets being disposed between the planeof the pivotal axes of the pair of brackets and their respective rollsand including cams journaled for rotation between related pairs ofbrackets to pivot the latter away from each other, each cam havingdiametrically opposed cam surfaces to engage related brackets, and atension spring associated with each pair of brackets to urge thebrackets toward each other.

13. In a machine for embracing a marginal edge portion of a tubular sidewall between connected flanges of a ring-shape member of generallyV-section, a frame, a rotatable mandrel journaled on said frame, a headsupported for pivotal movement on said frame about an axis normal to aline parallel to the rotational axis of the mandrel, a pair of rollbrackets mounted for pivotal movement on said head on parallel axesnormal to a line parallel to said mandrel axis and at one side of thelatter, means to move said brackets relative to each other, rollsjournaled in said brackets operative to roll connected ring flangestoward each other to embrace the marginal edge portion of a side wallresponsive to relative movement of said brackets, one roll beingdisposed between the axis of rotation and the projected periphery of themandrel and the other roll being outside the projected periphery of themandrel.

GEORGE D. JANSEN.

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